DSP-Based Voltage and Current Control for Uninterruptible Power Supply

• Main Authors: SU, HANN TZONG, 蘇漢宗
• Other Authors: CHERN, TZUEN LIH
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/03729686549230389324

碩士 === 國立中山大學 === 電機工程研究所 === 84 === This thesis presents a method which is composed of three parts, voltage controller, current controller and load current observer . A Dead-Beat controller, treated as the current controller, is designed in the inner current loop to control the capacitor charging current fast and effectively,especially when the sudden load is occurred. The purpose of load current observer is to estimate the load current by close-loop estimator for the stabilization and robustness of the inner current loop. An IVSC (Integral Variable Structure Controller), treated as the voltage controller, is designed in the outer loop to improve the system response irrespective of system''s parameter variation and load disturbance. Then, a full-bridge PWM inverter based on high speed DSP has been implemented to verify the proposed control scheme. The simulation and experimental result show that output voltage can follow a 60hz sinwave exactly under this control scheme.